1. Nanotechnology and Nanomedicine Division; Hacettepe University; Beytepe 06800 Ankara Turkey
2. Chemical Engineering Department; Northeastern University; Boston 02115 Massachusetts
3. Chemistry Department; Biochemistry Division, Hacettepe University; Beytepe 06800 Ankara Turkey
4. Center of Excellence for Advanced Materials Research, King Abdulaziz University; Jeddah Saudi Arabia